/*
 * Licensed under the Apache License, Version 2.0 (the "License").
 * You may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.exadel.aem.toolkit.plugin.handlers.lists;

import com.exadel.aem.toolkit.api.annotations.lists.ListItem;
import com.exadel.aem.toolkit.api.annotations.meta.Scopes;
import com.exadel.aem.toolkit.api.handlers.Handler;
import com.exadel.aem.toolkit.api.handlers.Handles;
import com.exadel.aem.toolkit.api.handlers.Source;
import com.exadel.aem.toolkit.api.handlers.Target;
import com.exadel.aem.toolkit.core.CoreConstants;

/**
 * Implements {@code Handler} to add to a {@link Target} instance the attribute declaring the current component
 * a list item
 */
@Handles(value = ListItem.class, scope = Scopes.COMPONENT)
public class ListItemHandler implements Handler {

    /**
     * Processes data that can be extracted from the given {@code Source} and stores it into the provided {@code Target}
     * @param source {@code Source} object used for data retrieval
     * @param target Resulting {@code Target} object
     */
    @Override
    public void accept(Source source, Target target) {
        if (source.adaptTo(ListItem.class) != null) {
            target.attribute(CoreConstants.PN_LIST_ITEM, true);
        }
    }
}
